Away sailing for the weekend! <img src="http://www.catsailor.com/forums/images/graemlins/smile.gif" alt="" />

What was the question?
Seriously though, my reading of the rules is that an F16 uni carries a mainsail and spi with associated gear. As such it should weigh more than 104Kg. If you've got an optimised boat, taking the spi and gear off will take you below minimum weight and therefore you're no longer class legal. Anyhow, why would you put yourself in a position where you didn't have the kite available to you should you need it? Fit it irrespective of the weather and pull it or don't pull it dependent on your ability/confidence/courage/sailing situation!!!